528 lines
15 KiB
C++
528 lines
15 KiB
C++
/* Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file storage/perfschema/table_threads.cc
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TABLE THREADS.
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*/
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#include "storage/perfschema/table_threads.h"
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#include "lex_string.h"
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#include "my_compiler.h"
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#include "my_dbug.h"
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#include "my_thread.h"
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#include "sql/field.h"
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#include "sql/plugin_table.h"
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#include "sql/sql_parse.h"
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#include "sql/table.h"
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#include "storage/perfschema/pfs_buffer_container.h"
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#include "storage/perfschema/pfs_instr.h"
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#include "storage/perfschema/pfs_instr_class.h"
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THR_LOCK table_threads::m_table_lock;
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Plugin_table table_threads::m_table_def(
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/* Schema name */
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"performance_schema",
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/* Name */
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"threads",
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/* Definition */
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" THREAD_ID BIGINT unsigned not null,\n"
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" NAME VARCHAR(128) not null,\n"
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" TYPE VARCHAR(10) not null,\n"
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" PROCESSLIST_ID BIGINT unsigned,\n"
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" PROCESSLIST_USER VARCHAR(32),\n"
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" PROCESSLIST_HOST VARCHAR(255) CHARACTER SET ASCII default null,\n"
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" PROCESSLIST_DB VARCHAR(64),\n"
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" PROCESSLIST_COMMAND VARCHAR(16),\n"
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" PROCESSLIST_TIME BIGINT,\n"
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" PROCESSLIST_STATE VARCHAR(64),\n"
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" PROCESSLIST_INFO LONGTEXT,\n"
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" PARENT_THREAD_ID BIGINT unsigned,\n"
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" `ROLE` VARCHAR(64),\n"
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" INSTRUMENTED ENUM ('YES', 'NO') not null,\n"
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" HISTORY ENUM ('YES', 'NO') not null,\n"
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" CONNECTION_TYPE VARCHAR(16),\n"
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" THREAD_OS_ID BIGINT unsigned,\n"
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" RESOURCE_GROUP VARCHAR(64),\n"
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" PRIMARY KEY (THREAD_ID) USING HASH,\n"
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" KEY (PROCESSLIST_ID) USING HASH,\n"
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" KEY (THREAD_OS_ID) USING HASH,\n"
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" KEY (NAME) USING HASH,\n"
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" KEY `PROCESSLIST_ACCOUNT` (PROCESSLIST_USER,\n"
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" PROCESSLIST_HOST) USING HASH,\n"
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" KEY (PROCESSLIST_HOST) USING HASH,\n"
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" KEY (RESOURCE_GROUP) USING HASH\n",
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/* Options */
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" ENGINE=PERFORMANCE_SCHEMA",
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/* Tablespace */
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nullptr);
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PFS_engine_table_share table_threads::m_share = {
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&pfs_updatable_acl,
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table_threads::create,
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NULL, /* write_row */
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NULL, /* delete_all_rows */
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cursor_by_thread::get_row_count,
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sizeof(PFS_simple_index), /* ref length */
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&m_table_lock,
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&m_table_def,
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false, /* perpetual */
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PFS_engine_table_proxy(),
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{0},
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false /* m_in_purgatory */
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};
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PFS_engine_table *table_threads::create(PFS_engine_table_share *) {
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return new table_threads();
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}
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table_threads::table_threads() : cursor_by_thread(&m_share) {}
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bool PFS_index_threads_by_thread_id::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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bool PFS_index_threads_by_processlist_id::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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bool PFS_index_threads_by_name::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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bool PFS_index_threads_by_user_host::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key_1.match(pfs)) {
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return false;
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}
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}
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if (m_fields >= 2) {
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if (!m_key_2.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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bool PFS_index_threads_by_host::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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bool PFS_index_threads_by_thread_os_id::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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bool PFS_index_threads_by_resource_group::match(PFS_thread *pfs) {
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if (m_fields >= 1) {
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if (!m_key.match(pfs)) {
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return false;
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}
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}
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return true;
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}
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int table_threads::index_init(uint idx, bool) {
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PFS_index_threads *result = NULL;
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switch (idx) {
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case 0:
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result = PFS_NEW(PFS_index_threads_by_thread_id);
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break;
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case 1:
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result = PFS_NEW(PFS_index_threads_by_processlist_id);
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break;
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case 2:
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result = PFS_NEW(PFS_index_threads_by_thread_os_id);
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break;
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case 3:
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result = PFS_NEW(PFS_index_threads_by_name);
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break;
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case 4:
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result = PFS_NEW(PFS_index_threads_by_user_host);
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break;
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case 5:
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result = PFS_NEW(PFS_index_threads_by_host);
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break;
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case 6:
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result = PFS_NEW(PFS_index_threads_by_resource_group);
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break;
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default:
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DBUG_ASSERT(false);
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}
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m_opened_index = result;
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m_index = result;
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return 0;
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}
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int table_threads::make_row(PFS_thread *pfs) {
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pfs_optimistic_state lock;
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pfs_optimistic_state session_lock;
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pfs_optimistic_state stmt_lock;
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PFS_stage_class *stage_class;
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PFS_thread_class *safe_class;
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/* Protect this reader against thread termination */
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pfs->m_lock.begin_optimistic_lock(&lock);
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safe_class = sanitize_thread_class(pfs->m_class);
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if (unlikely(safe_class == NULL)) {
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return HA_ERR_RECORD_DELETED;
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}
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m_row.m_thread_internal_id = pfs->m_thread_internal_id;
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m_row.m_parent_thread_internal_id = pfs->m_parent_thread_internal_id;
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m_row.m_processlist_id = pfs->m_processlist_id;
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m_row.m_thread_os_id = pfs->m_thread_os_id;
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m_row.m_name = safe_class->m_name;
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m_row.m_name_length = safe_class->m_name_length;
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/* Protect this reader against session attribute changes */
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pfs->m_session_lock.begin_optimistic_lock(&session_lock);
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m_row.m_username_length = pfs->m_username_length;
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if (unlikely(m_row.m_username_length > sizeof(m_row.m_username))) {
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return HA_ERR_RECORD_DELETED;
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}
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if (m_row.m_username_length != 0) {
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memcpy(m_row.m_username, pfs->m_username, m_row.m_username_length);
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}
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m_row.m_hostname_length = pfs->m_hostname_length;
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if (unlikely(m_row.m_hostname_length > sizeof(m_row.m_hostname))) {
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return HA_ERR_RECORD_DELETED;
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}
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if (m_row.m_hostname_length != 0) {
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memcpy(m_row.m_hostname, pfs->m_hostname, m_row.m_hostname_length);
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}
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m_row.m_groupname_length = pfs->m_groupname_length;
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if (unlikely(m_row.m_groupname_length > sizeof(m_row.m_groupname))) {
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return HA_ERR_RECORD_DELETED;
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}
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if (m_row.m_groupname_length != 0) {
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memcpy(m_row.m_groupname, pfs->m_groupname, m_row.m_groupname_length);
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}
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if (!pfs->m_session_lock.end_optimistic_lock(&session_lock)) {
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/*
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One of the columns:
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- PROCESSLIST_USER
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- PROCESSLIST_HOST
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is being updated.
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Do not discard the entire row.
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Do not loop waiting for a stable value.
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Just return NULL values.
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*/
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m_row.m_username_length = 0;
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m_row.m_hostname_length = 0;
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}
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/* Protect this reader against statement attributes changes */
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pfs->m_stmt_lock.begin_optimistic_lock(&stmt_lock);
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m_row.m_dbname_length = pfs->m_dbname_length;
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if (unlikely(m_row.m_dbname_length > sizeof(m_row.m_dbname))) {
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return HA_ERR_RECORD_DELETED;
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}
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if (m_row.m_dbname_length != 0) {
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memcpy(m_row.m_dbname, pfs->m_dbname, m_row.m_dbname_length);
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}
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m_row.m_processlist_info_ptr = &pfs->m_processlist_info[0];
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m_row.m_processlist_info_length = pfs->m_processlist_info_length;
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if (!pfs->m_stmt_lock.end_optimistic_lock(&stmt_lock)) {
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/*
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One of the columns:
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- PROCESSLIST_DB
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- PROCESSLIST_INFO
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is being updated.
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Do not discard the entire row.
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Do not loop waiting for a stable value.
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Just return NULL values.
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*/
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m_row.m_dbname_length = 0;
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m_row.m_processlist_info_length = 0;
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}
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/* Dirty read, sanitize the command. */
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m_row.m_command = pfs->m_command;
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if ((m_row.m_command < 0) || (m_row.m_command > COM_END)) {
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m_row.m_command = COM_END;
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}
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m_row.m_start_time = pfs->m_start_time;
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stage_class = find_stage_class(pfs->m_stage);
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if (stage_class != NULL) {
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m_row.m_processlist_state_ptr =
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stage_class->m_name + stage_class->m_prefix_length;
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m_row.m_processlist_state_length =
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stage_class->m_name_length - stage_class->m_prefix_length;
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if (m_row.m_processlist_state_length > 64) {
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/*
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Column PROCESSLIST_STATE is VARCHAR(64)
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for compatibility reasons with the historical
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INFORMATION_SCHEMA.PROCESSLIST table.
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Stages however can have longer names.
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We silently truncate data here,
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so it fits into PROCESSLIST_STATE.
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*/
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m_row.m_processlist_state_length = 64;
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}
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} else {
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m_row.m_processlist_state_length = 0;
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}
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m_row.m_connection_type = pfs->m_connection_type;
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m_row.m_enabled = pfs->m_enabled;
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m_row.m_history = pfs->m_history;
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m_row.m_psi = pfs;
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if (!pfs->m_lock.end_optimistic_lock(&lock)) {
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return HA_ERR_RECORD_DELETED;
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}
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return 0;
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}
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int table_threads::read_row_values(TABLE *table, unsigned char *buf,
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Field **fields, bool read_all) {
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Field *f;
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const char *str = NULL;
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int len = 0;
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/* Set the null bits */
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DBUG_ASSERT(table->s->null_bytes == 2);
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buf[0] = 0;
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buf[1] = 0;
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for (; (f = *fields); fields++) {
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if (read_all || bitmap_is_set(table->read_set, f->field_index)) {
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switch (f->field_index) {
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case 0: /* THREAD_ID */
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set_field_ulonglong(f, m_row.m_thread_internal_id);
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break;
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case 1: /* NAME */
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set_field_varchar_utf8(f, m_row.m_name, m_row.m_name_length);
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break;
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case 2: /* TYPE */
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if (m_row.m_processlist_id != 0) {
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set_field_varchar_utf8(f, "FOREGROUND", 10);
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} else {
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set_field_varchar_utf8(f, "BACKGROUND", 10);
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}
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break;
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case 3: /* PROCESSLIST_ID */
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if (m_row.m_processlist_id != 0) {
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set_field_ulonglong(f, m_row.m_processlist_id);
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} else {
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f->set_null();
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}
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break;
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case 4: /* PROCESSLIST_USER */
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if (m_row.m_username_length > 0) {
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set_field_varchar_utf8(f, m_row.m_username,
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m_row.m_username_length);
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} else {
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f->set_null();
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}
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break;
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case 5: /* PROCESSLIST_HOST */
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if (m_row.m_hostname_length > 0) {
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set_field_varchar_utf8(f, m_row.m_hostname,
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m_row.m_hostname_length);
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} else {
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f->set_null();
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}
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break;
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case 6: /* PROCESSLIST_DB */
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if (m_row.m_dbname_length > 0) {
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set_field_varchar_utf8(f, m_row.m_dbname, m_row.m_dbname_length);
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} else {
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f->set_null();
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}
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break;
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case 7: /* PROCESSLIST_COMMAND */
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if (m_row.m_processlist_id != 0)
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set_field_varchar_utf8(f, command_name[m_row.m_command].str,
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(uint)command_name[m_row.m_command].length);
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else {
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f->set_null();
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}
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break;
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case 8: /* PROCESSLIST_TIME */
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if (m_row.m_start_time) {
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time_t now = my_time(0);
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ulonglong elapsed =
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(now > m_row.m_start_time ? now - m_row.m_start_time : 0);
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set_field_ulonglong(f, elapsed);
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} else {
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f->set_null();
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}
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break;
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case 9: /* PROCESSLIST_STATE */
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if (m_row.m_processlist_state_length > 0) {
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set_field_varchar_utf8(f, m_row.m_processlist_state_ptr,
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m_row.m_processlist_state_length);
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} else {
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f->set_null();
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}
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break;
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case 10: /* PROCESSLIST_INFO */
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if (m_row.m_processlist_info_length > 0)
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set_field_blob(f, m_row.m_processlist_info_ptr,
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m_row.m_processlist_info_length);
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else {
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f->set_null();
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}
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break;
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case 11: /* PARENT_THREAD_ID */
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if (m_row.m_parent_thread_internal_id != 0) {
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set_field_ulonglong(f, m_row.m_parent_thread_internal_id);
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} else {
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f->set_null();
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}
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break;
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case 12: /* ROLE */
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f->set_null();
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break;
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case 13: /* INSTRUMENTED */
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set_field_enum(f, m_row.m_enabled ? ENUM_YES : ENUM_NO);
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break;
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case 14: /* HISTORY */
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set_field_enum(f, m_row.m_history ? ENUM_YES : ENUM_NO);
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break;
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case 15: /* CONNECTION_TYPE */
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get_vio_type_name(m_row.m_connection_type, &str, &len);
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if (len > 0) {
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set_field_varchar_utf8(f, str, len);
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} else {
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f->set_null();
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}
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break;
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case 16: /* THREAD_OS_ID */
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if (m_row.m_thread_os_id > 0) {
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set_field_ulonglong(f, m_row.m_thread_os_id);
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} else {
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f->set_null();
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}
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break;
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case 17: /* RESOURCE_GROUP */
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if (m_row.m_groupname_length > 0) {
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set_field_varchar_utf8(f, m_row.m_groupname,
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m_row.m_groupname_length);
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} else {
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f->set_null();
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}
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break;
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default:
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DBUG_ASSERT(false);
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}
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}
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}
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return 0;
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}
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int table_threads::update_row_values(TABLE *table, const unsigned char *,
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unsigned char *, Field **fields) {
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Field *f;
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enum_yes_no value;
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for (; (f = *fields); fields++) {
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if (bitmap_is_set(table->write_set, f->field_index)) {
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switch (f->field_index) {
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case 0: /* THREAD_ID */
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case 1: /* NAME */
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case 2: /* TYPE */
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case 3: /* PROCESSLIST_ID */
|
|
case 4: /* PROCESSLIST_USER */
|
|
case 5: /* PROCESSLIST_HOST */
|
|
case 6: /* PROCESSLIST_DB */
|
|
case 7: /* PROCESSLIST_COMMAND */
|
|
case 8: /* PROCESSLIST_TIME */
|
|
case 9: /* PROCESSLIST_STATE */
|
|
case 10: /* PROCESSLIST_INFO */
|
|
case 11: /* PARENT_THREAD_ID */
|
|
case 12: /* ROLE */
|
|
return HA_ERR_WRONG_COMMAND;
|
|
case 13: /* INSTRUMENTED */
|
|
value = (enum_yes_no)get_field_enum(f);
|
|
m_row.m_psi->set_enabled((value == ENUM_YES) ? true : false);
|
|
break;
|
|
case 14: /* HISTORY */
|
|
value = (enum_yes_no)get_field_enum(f);
|
|
m_row.m_psi->set_history((value == ENUM_YES) ? true : false);
|
|
break;
|
|
case 15: /* CONNECTION_TYPE */
|
|
case 16: /* THREAD_OS_ID */
|
|
return HA_ERR_WRONG_COMMAND;
|
|
case 17: /* RESOURCE_GROUP */
|
|
return HA_ERR_WRONG_COMMAND;
|
|
default:
|
|
DBUG_ASSERT(false);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|